heya,
i pushed some changes to the hdr code which make the pink spots go away and
also recover as much of the highlights as i could get from the sequence of
pictures you sent me.
the problem is still that the brightest exposure has a lot more sun than
the other images, so there are some unexpected changes to the radiance
distribution in these images.. which is not all that bad, but some cases
these additional sunspots cause blown out highlights which in turn cause
some discontinuities in the final image around those highlights.
not sure what to do about that without resorting to things like `blur the
hell out of some mask buffer'. the whole point in merging the hdr in raw is
that it should be more radiometrically correct than any method that needs
to recover something from already interpolated images (maybe even ldr
jpg..).
let me know if that works for you like this, or if you have another case
where it breaks completely.
cheers,
jo
On Thu, Oct 16, 2014 at 9:31 PM, johannes hanika <hana...@gmail.com> wrote:
> not sure i understand exactly, but sounds wrong. do you have sample images
> so i can have a look?
>
> -jo
>
> On Thu, Oct 16, 2014 at 9:10 AM, Pascal Obry <pas...@obry.net> wrote:
>
>> I've tried again today an HDR image from 3 RAW files. My RAW files are
>> -1EV, +1EV and standard exposition. The RAW exposed for the shadows
>> are of course burning the highlight and those areas are being rendered
>> with purple color.
>>
>> I found out that if I do the HDR from the 2 images with lowest
>> exposures I have no purple areas.
>>
>> This is not expected to me, as the point of HDR is exactly that avoid
>> the highlight and dark zones. If I expose for the dark area I have
>> burnt highlight and if I expose for highlight I have black areas.
>>
>> So what's the point if to do an HDR I have to take pictures with
>> "correct" exposure?
>>
>> Thoughts?
>>
>> --
>> Pascal Obry / Magny Les Hameaux (78)
>>
>> The best way to travel is by means of imagination
>>
>> http://v2p.fr.eu.org
>> http://www.obry.net
>>
>> gpg --keyserver keys.gnupg.net --recv-key F949BD3B
>>
>>
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